EASY
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Earn 100
Draw the ray diagram for formation of primary rainbow.
Important Questions on Ray Optics and Optical Instruments
EASY
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IMPORTANT
A bi-convex lens has a focal length equal to half the radius of curvature of either surface. What is the index of refraction of the lens material ?
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A ray of light enters a liquid and a bent towards the normal as shown. Calculate the speed of light in the liquid.
MEDIUM
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IMPORTANT
If the absolute refractive index of glass is and water is Find the ratio of focal lengths of a glass lens when in water and when in air.
MEDIUM
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IMPORTANT
A ray of light is incident on a glass sphere at an angle of incidence Show that angle of emergence is
EASY
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IMPORTANT
Write lens maker's formula and describe the symbols used in it.
MEDIUM
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IMPORTANT
A curved surface is convex to the incident beam of light. Does it form real image? Draw the ray diagram.
EASY
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IMPORTANT
Mention any four applications of total internal reflection phenomenon.
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IMPORTANT
When a monochromatic visible light beam enters water from air, how are its speed, wavelength and frequency affected ?
